Baseball managers are only useful around the margins. The Cubs have had a lot of margins to expose Ross for better or worse. My opinion is that like a lot of baseball lifers, he has a penchant for veterans and he has a problem with letting starting pitchers go too long. But the time he does pull a guy early this happens. So.. he's damned if he does and damned if he doesn't. He's very likely a net positive overall. His teams play hard all the time even when they don't have too.